Warm up: Which one of the fluids at the front of the room will flow the fastest? Which will flow the slowest? Honey, Chocolate syrup, or Applesauce? Make a prediction at your table, thinking about an explanation behind your prediction.

Viscosity Measure of resistance for how well a fluid can flow. How “sticky” a fluid is. More viscous = slower flowing Less viscous = faster flowing

What you need at your tables: A dixie cup with each of the following: – Chocolate syrup – Honey – Applesauce A couple paper plates and plastic spoons

Testing viscosity First test the three unaltered substances: honey, chocolate syrup, and applesauce. Place a small blob of each on the edge of a paper plate, slowly elevate and watch to see what happens… Describe the fluids and their viscosity.

Ideas on how to change a fluids viscosity… If we wanted one of these fluids to flow faster or slower, what could we do to change it?

How to change viscosity… Now you need to come up and get chocolate chips and some heated honey. – The chocolate chips act as additional particulates such as silica that can be added to magma Compare heated honey to the unheated, and see how adding “silica” changes viscosity of the chocolate syrup

Exit Ticket Before you leave, write down on a piece of paper which viscosity magma you think leads to a more explosive eruption and why. – Do volcanoes that erupt explosively have a high viscosity lava or a low viscosity lava? Why?

Warm-up What conditions could create a high viscosity lava? What shape mountain would this lava form over time?

Station Day In groups, you will travel to each of the 4 stations. The four stations are: – Shield volcanoes, stratovolcanoes, cinder cone volcanoes, and caldera volcanoes You will take a worksheet with you that has clues to each of these types of volcanoes, along with your foldable organizer.

As you move around the room… Take some notes on each type in your foldable organizer… Try to match the types to the four spaces on your worksheet, using the clues. – When you make a match, fill in the missing clue from the box provided

Anatomy of a volcano: Draw a cross-section of a volcano with these parts Crater: A steep-sided, usually circular depression formed by either explosion or collapse at a volcanic vent. Eruption Cloud: The column of gases, ash, and larger rock fragments rising from a crater or other vent. Magma Chamber: The subterranean cavity containing the magma which feeds a volcano. Pipe: A vertical conduit through the Earth's crust below a volcano, through which magma passes Plug: Solidified lava that fills the conduit of a volcano Vent: The opening at the earth's surface through which volcanic materials issue forth Dike: Formed when magma rises into an existing fracture or crack in the volcano, and then solidifies Fissures: Elongated fractures or cracks on the slopes of a volcano.